. >> and japanese scient shinya yamanaka -- [ laughter ] >> will share the prize for medicine. both have done work, it's serious, discovering how matured cells in the body can be harvested and turned into stem cells. those stem cells in turn are being used to create replacement tissue for damaged parts of the body. long before dolly the sheep was cloned, remember dolly? gurdon-- >> isn't it gurdon? yes, it's g-u-r-d-o-n. >> i want to call him gordon, i'm sorry. used frog cells to create new tad poles. last week japanese scientists used yamanaka's approach to use mice cells to produce baby mice. >> on the screen it's different. >> i made it funny with -- >> tell us which is correct. we have it two different ways. competely different. >> let's talk about john. >> let's talk about john. >> the same work, however, the year that yamanaka was born was the first time john gurdon came up with this. they worked on it independently. you can tell this work has been going on for a long time. congratulations to both of them. >> boeing of them. >>> a letter written by albert einstein is bein